Cozi

The free Cozi app lets you manage your family calendar by adding appointments, setting reminders, and uploading to-do lists that all family members can see. Cozi works on your iPhone or iPad, Android, BlackBerry, or the web, and your updates automatically sync to all users connected to your account. Cozi can even send emails confirming appointments to any family member's inbox or text them directly. Also keep track of memories and photos in the Cozi family journal.